“The literal simplest meaning of “Christmas” = Christ as the “Sent One.”” A nonsense statement…. the term Christmas comes from a combining of Christ and mass….not Chris is the sent one but Christ’s mass (i.e. the celebration of his death because that is what a mass is)

From a Bible church...can find other sources if you wish:

We have entered into the Christmas Holiday season. In light of this, I think it is important for us to recognize some things. One is concerning the word "Christmas." We get the word Christmas from two Latin words: Christus, and missa. Putting these two words together, we get the compound word, Christ-mas. Christmas, like all compound words, has a meaning that the particles explain. It literally means "Christ is sent." This morning I want us to prepare our hearts for a sermon that has to do with the great event of the sending of Christ. The theme is, God's Christmas Plan: Christ is Sent
God's Christmas Plan: Christ is Sent

And Missa est is recognized by Catholics as "go/sent":
QUESTION: WHAT DOES “ITE, MISSA EST” REALLY MEAN?

“Ite, Missa est” is the Latin concluding prayer of the Catholic Mass. Non-Catholics listen up: the Mass is highest form of worship for Catholics. It concludes with a brief dialogue between the priest and the congregation. Here’s how it goes in Latin: Priest: Dominus vobiscum [The Lord be with you] People: Et cum spiritu tuo. [And with your spirit.] Priest: Ite, missa est. People: Deo gratias. [Thanks be to God] Normally translated today as “Go, the Mass is ended,” “Ite, missa est” literally means “Go, it has been sent.”

From this phrase we get the word “Mass” as well as the word “missal,” which is the name for the book containing the prayers of the Mass.

Sorry, Nifster, even the Catholics here say that "mass" comes from the Latin Missa...

Since the linguist background of Christmas comes from Christmasse and Old English word that refers to Christ and mass (check any dictionary) AND since the words you sight actually refer to the DISMISSAL from the service (i.e. go….not sent) the meaning came to be about going forth and carrying the message.

You are clueless. But that’s okay. I have come to expect that from your posts